.TH "PAPI_accum" 3 "Tue Jan 15 2013" "Version 5.1.0.2" "PAPI" \" -*- nroff -*-
.ad l
.nh
.SH NAME
PAPI_accum \- 
.PP
Accumulate and reset counters in an EventSet.  

.SH SYNOPSIS
.br
.PP
.SH "Detailed Description"
.PP 
\fBC Interface:\fP
.RS 4
#include <\fBpapi.h\fP> 
.br
 int PAPI_accum( int  EventSet, long_long * values );
.RE
.PP
These calls assume an initialized PAPI library and a properly added event set. \fBPAPI_accum\fP adds the counters of the indicated event set into the array values. The counters are zeroed and continue counting after the operation. Note the differences between \fBPAPI_read\fP and \fBPAPI_accum\fP, specifically that \fBPAPI_accum\fP resets the values array to zero.
.PP
\fBParameters:\fP
.RS 4
\fIEventSet\fP an integer handle for a PAPI Event Set as created by \fBPAPI_create_eventset\fP 
.br
\fI*values\fP an array to hold the counter values of the counting events
.RE
.PP
\fBReturn values:\fP
.RS 4
\fIPAPI_EINVAL\fP One or more of the arguments is invalid. 
.br
\fIPAPI_ESYS\fP A system or C library call failed inside PAPI, see the errno variable. 
.br
\fIPAPI_ENOEVST\fP The event set specified does not exist.
.RE
.PP
\fBExamples:\fP
.RS 4

.PP
.nf
    do_100events( );
    if ( PAPI_read( EventSet, values) != PAPI_OK )
    handle_error( 1 );
    // values[0] now equals 100
    do_100events( );
    if (PAPI_accum( EventSet, values ) != PAPI_OK )
    handle_error( 1 );
    // values[0] now equals 200
    values[0] = -100;
    do_100events( );
    if (PAPI_accum( EventSet, values ) != PAPI_OK )
    handle_error( 1 );
    // values[0] now equals 0

.fi
.PP
.RE
.PP
\fBSee also:\fP
.RS 4
\fBPAPIF_accum\fP 
.PP
\fBPAPI_start\fP 
.PP
\fBPAPI_set_opt\fP 
.PP
\fBPAPI_reset\fP 
.RE
.PP


.SH "Author"
.PP 
Generated automatically by Doxygen for PAPI from the source code.
